Core DF87-20 (Outer shelf break, north of Mawson Bank, eastward thinning sediment wedge )
Associated publications
| Title | Author(s) | Publication | DOI | View cores |
|---|---|---|---|---|
| Late Cenozoic glacial-marine, carbonate, and turbidite sedimentation in the northwestern Ross Sea, Antarctica | Reid, David Eugene | , 1989 | https://www.proquest.com/docview/194016843/fulltextPDF/306796DA039B49D7PQ/1?accountid=25386&sourcetype=Dissertations%20&%20Theses |
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Core information
| Core name | Region | Collection date | IGSN ID | Core type | Latitude (DD) | Longitude (DD) | Water depth (m) |
Core length (m) |
Comments |
|---|---|---|---|---|---|---|---|---|---|
| DF87-20 | Antarctica, Ross Sea | None | Piston | -72.53883 | 174.97050 | 622.0 | 0.85 | Comprised of barnacle hash and benthonic and planktonic foraminifera, with common bryozoan fragments and echinoid spines.; Yellowish gray (5Y 7/2); rounded sedimentary clast composed of diatomaceous mud, light olive gray (5Y 5/2), between 36-40 cm; 12 mm rounded balistic pebbles between 35-37 cm; fine subangular to subrounded pebbles of various compositions common between 22-25 cm; very fine, angular to subrounded pebbles of various compositions abundant throughout; sharp irregular inclined contact.; Olive gray (5Y 4/1); very fine and fine subangular to subrounded pebbles common throughout; sharp irregular contact. ; Moderate olive brown (5Y 4/4); this unit differs from the overlying unit in having less claay and more silt and diatoms; sedimentary clasts up to 16 mm composed of diatomaceous sandy mud, moderate olive beow. (5Y 4/4), between 62-67 cm; very fine to fine subangular to subrounded pebbles of various compositions common throughout.; Reported as >35,750 14C yrs BP |
Expedition information
| Expedition name | Ship | Start date | End date | Report DOI |
|---|---|---|---|---|
| DF87 | USCGC Glacier | Dec. 17, 1986 | Jan. 16, 1987 | https://osu-mgr.org/OSU-DF87 |
Samples in this core
| Sample ID | Core depth (m) |
Lithology | Facies interpretation | Carbon type | Sample preparation type | Age (14C yr ± 1σ) | Calibrated age, median probability (cal. yr BP) | Calibrated age, 2σ range (cal. yr BP) | Comments |
|---|---|---|---|---|---|---|---|---|---|
| DF87-20_8-13 | 0.08 - 0.13 | Gravelly calcareous hash | Carbonate sedimentation during LGM, low clastic sedimentation, high nutrient supply, seasonal open marine during LGM, east to west increase in current strength, winnowed and current swept seafloor | Barnacle hash, benthic/planktic foraminifera, bryozoans, echinoid spines | Carbonate hydrolysis | 27590.0 ± 460.0 | 29800.0 | 30804.0-28837.0 | None |
| DF87-20_34-40 | 0.34 - 0.4 | Gravelly sandy silt | Carbonate sedimentation during LGM, low clastic sedimentation, high nutrient supply, seasonal open marine during LGM, east to west increase in current strength, winnowed and current swept seafloor | Barnacle hash, benthic/planktic foraminifera, bryozoans, echinoid spines | Carbonate hydrolysis | 35750.0 ± None | Calibrated age for default reservoir correction not available | Calibrated age for default reservoir correction not available | None |
Associated documents
No associated documents.